The mechanism of linkage-specific ubiquitin chain elongation by a single-subunit E2.
The mechanism of linkage-specific ubiquitin chain elongation by a single-subunit E2.
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DOI:
10.1016/j.cell.2011.01.035
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发表时间:
2011-03-04
期刊:
影响因子:
64.5
通讯作者:
Rape M
中科院分区:
文献类型:
--
作者:
Wickliffe KE;Lorenz S;Wemmer DE;Kuriyan J;Rape M
Ubiquitin chains of different topologies trigger distinct functional consequences, including protein degradation and reorganization of complexes. The assembly of most ubiquitin chains is promoted by E2s, yet how these enzymes achieve linkage specificity is poorly understood. We have discovered that the K11-specific Ube2S orients the donor ubiquitin through an essential non-covalent interaction that occurs in addition to the thioester bond at the E2 active site. The E2-donor ubiquitin complex transiently recognizes the acceptor ubiquitin, primarily through electrostatic interactions. The recognition of the acceptor ubiquitin surface around Lys11, but not around other lysines, generates a catalytically competent active site, which is composed of residues of both Ube2S and ubiquitin. Our studies suggest that monomeric E2s promote linkage-specific ubiquitin chain formation through substrate-assisted catalysis.
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影响因子:
64.8
作者:
通讯作者:
--
DOI:
10.1073/pnas.0907887106
发表时间:
2009-10-27
影响因子:
11.1
作者:
Williamson, Adam;Wickliffe, Katherine E.;Rape, Michael
通讯作者:
Rape, Michael
DOI:
10.1073/pnas.0912802107
发表时间:
2010-01-26
影响因子:
11.1
作者:
Wu, Tao;Merbl, Yifat;Kirschner, Marc W.
通讯作者:
Kirschner, Marc W.
影响因子:
64.5
作者:
Rape, M;Reddy, SK;Kirschner, MW
通讯作者:
Kirschner, MW
影响因子:
8
作者:
Wagner, KW;Sapinoso, LM;Hampton, GM
通讯作者:
Hampton, GM